Ambient occlusion causing ghosting for animations when viewport is resized on DX11

Tested regression against //UE5/Release-5.4 @ CL35576357 and the issue did not occur. This is a confirmed regression.

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Daren Cheng – 2025-02-10 19:05:14 UTC

Hi folks. I found an odd offset TSR issue. Seems to only happen in DX11 so figured would make a thread here. :thread2-6550:

Daren Cheng – 2025-02-10 19:05:23 UTC

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Daren Cheng – 2025-02-10 19:07:03 UTC

To repro.

1. Go to Animation_Basics map in Content examples.
2. Move to Additive section
3. Observe odd ghosting / offset TSR on applied additive.

Note: May need to change viewport size to repro (Scale width up / down).

Daren Cheng – 2025-02-10 19:08:32 UTC

If desired I can make a JIRA for this. For further investigation though would ask to forward to QA.

From a search I didn't find a JIRA for this. May have missed it though.

Aleksander Netzel – 2025-02-10 19:14:25 UTC

@Tiantian Xie for vis

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1. Open Content Examples with command arguments
   • -d3d11
2. Open the Animation_Basics map
3. Move to Additive section
4. Simulate
5. Resize the viewport

Results: Observe odd ghosting
Expected: No ghosting appears on applied additive after viewport is resized